CN109357958A - A kind of high-speed railway touching net dropper bending fretting fatigue testing device - Google Patents
A kind of high-speed railway touching net dropper bending fretting fatigue testing device Download PDFInfo
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- CN109357958A CN109357958A CN201811507801.1A CN201811507801A CN109357958A CN 109357958 A CN109357958 A CN 109357958A CN 201811507801 A CN201811507801 A CN 201811507801A CN 109357958 A CN109357958 A CN 109357958A
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 33
- 238000005452 bending Methods 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 239000000725 suspension Substances 0.000 claims abstract 10
- 230000000452 restraining effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000002788 crimping Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 7
- 238000011161 development Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 241000208340 Araliaceae Species 0.000 description 1
- 208000032767 Device breakage Diseases 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本发明公开一种高速铁路接触网吊弦弯曲微动疲劳试验装置，包括吊弦固定端、力补偿端、疲劳载荷加载部分和数据采集处理单元。吊弦试样一端固定在固定端支座上，另一端固定在力补偿端支座上，通过力补偿弹簧给吊弦施加预紧力，吊弦中间部分通过加载杆与疲劳试验机相连。整个试验过程中，设置好固定端的压力和吊弦的预紧力，通过控制疲劳试验机来进行变参数、多工况的吊弦弯曲微动试验。
The invention discloses a high-speed railway catenary suspension string bending fretting fatigue test device, comprising a suspension string fixed end, a force compensation end, a fatigue load loading part and a data acquisition and processing unit. One end of the hanging string sample is fixed on the fixed end support, and the other end is fixed on the force compensation end support. The force compensation spring is used to apply a pre-tightening force to the hanging string, and the middle part of the hanging string is connected to the fatigue testing machine through the loading rod. During the whole test process, the pressure of the fixed end and the pre-tightening force of the hanging string are set, and the bending fretting test of the hanging string with variable parameters and multiple working conditions is carried out by controlling the fatigue testing machine.
Description
Technical field
The present invention relates to railway Pantograph-OCS system dropper testing fatigue technical fields, contact more particularly to a kind of high-speed railway
Net dropper is bent fretting fatigue testing device.
Background technique
Fretting fatigue refers between the contact surfaces of two contact workpieces in mechanical oscillation, fatigue load, electric and magnetic oscillation or thermal cycle
Etc. under various alternate load effects, the minimum relative motion of the amplitude of generation is concentrated so as to cause higher stress and is worn
Fatigue behaviour.It is widely present in the neck such as aerospace, automobile, machinery, railway, electric power, nuclear reactor, bridge, biomedicine
It is the main reason for many key components and parts fail in the immovable fitting component in domain.
Nearly ten years, with the fast development of economy and society, China Railway High-speed has obtained great-leap-forward development, and drives
World's high-speed rail upsurge in construction of a new round.By the end of the year 2017, China Railway High-speed operating mileage alreadys exceed 2.5 ten thousand public affairs
In, 60% or more of world's high-speed rail total kilometrage is accounted for, high-speed railway has become the glittering business card of Chinese innovation and development.From Chinese iron
Since the raising speed by a large scale of road the 6th time, large quantities of speed per hours are 200km/h and the train of higher speed grade puts into effect, are people group
Many trips provide a great convenience.
With the fast development of high-speed railway, the fracture failure of dropper is outstanding day by day, once dropper fracture failure, cleavage
The contact line set just will appear the phenomenon that collapses, and influence pantograph current carrying quality, directly results in train operation failure, influences people
The security of the lives and property of the people masses.According to military wide company feedback, since operation 7 years, hundred kilometers of droppers are broken tens.According to other lines
Road feedback, dropper occurs that breakage problem is extremely more with respect to for other components, but inspection point all proves the experimental study of dropper
It is qualified.It was initially believed that caused by the main reason for causing this phenomenon is fatigue damage and fretting wear.Disclose dropper
Fracture failure mechanism can provide certain theoretical ginseng for design, construction, operation and the maintenance of high speed contact net dropper from now on
It examines, finally effectively extends the service life of dropper.Determine currently, there is no exclusively for dropper bending fretting fatigue testing amount body
The testing equipment of system.
Summary of the invention
The object of the present invention is to provide a kind of high-speed railway touching net droppers to be bent fretting fatigue testing device, on solving
Problem of the existing technology is stated, the experimental rig is simple to operation, it can be achieved that the bending of various working, plurality of specifications dropper is micro-
Dynamic fatigue test, measurement and control precision are high, and data are more reliable.
To achieve the above object, the present invention provides following schemes: the present invention provides a kind of high-speed railway touching net dropper
It is bent fretting fatigue testing device, including fixing end support, force compensating end, load bar and the control being fixed on testing stand table top
System；
Supporing shell is provided on the fixing end support, the fixed link of the supporing shell side passes through bolt for dropper
One end tentatively connected and fixed, the fixing end support includes upper crimp head and lower crimp head, it is preliminary it is fixed after
It is compressed across the upper crimp head and lower crimp head at the clamper tube of the dropper；
The other end of the dropper is adjustable end, and the adjustable end is connected with the force compensating end, on the force compensating end
One U-bolt is set, it can come realize the dropper by the connecting pin of the other end and the U-bolt that change the dropper
It adjusts；The force compensating end is for adjusting the power being applied on the dropper；
The upper end of the load bar is connected with fatigue test machine grip holder, lower end fixed by bolt and the dropper and incite somebody to action
The signals such as the test force and test frequency of the fatigue tester are transmitted on the dropper；
The fixing end support, force compensating end and load bar are electrically connected with the control system.
Preferably, one end of the fixed link on the outside of fastening nut one and the supporing shell by being fixedly connected, institute
State the other end that fixed link is connect with the dropper wear in the supporing shell；And felt pad is cased in the fixed link.
Preferably, reinforcing bolt is provided at the top of the fixing end support, the reinforcing bolt is used for the upper pressure
Joint applies restraining force.
Preferably, it is provided with first pressure sensor between the bottom end and the upper crimp head of the reinforcing bolt, it is described
First pressure sensor is connect with the control system signal.
Preferably, the force compensating end includes the force compensating support, force compensating bar and force compensating bullet being fixed on erecting bed
Spring；The adjustable end of the dropper is connected by positioning bolt with the force compensating bar, and the force compensating bar can be in the force compensating
It horizontally slips on support, the other end of the force compensating bar passes through the force compensating support rear enclosure and is equipped with the force compensating spring；
The outside of the force compensating spring is fixed by fastening nut two.
Preferably, it is located on the force compensating bar inside and outside the force compensating spring and is respectively arranged with spring washer one
With spring washer two, the spring washer two is disposed adjacent with the fastening nut two.
Preferably, second is provided between the spring washer one and the force compensating support on the force compensating bar
Pressure sensor, the second pressure sensor are connect with the control system signal.
Preferably, the U-bolt is set to the outside of the positioning bolt.
The present invention achieves following technical effect compared with the existing technology:
High-speed railway touching net dropper in the present invention is bent fretting fatigue testing device, can be to dropper by the device
Fracture damage mechanism study is supplemented, using electo hydraulic servocontrolled fatigue testing machine carry out fatigue loading, ensure that test accuracy with
And the reliability of test data, in the tooling of design, it is contemplated that dropper current-carrying devises insulating unit, it can be achieved that current-carrying is hung
String test more accurately simulates the actual condition of dropper, and current control accuracy is high, and stability is good, overcomes experimental condition list
One, the accurate not high defect of data.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the overall structure diagram that the dropper is bent fretting fatigue testing device；
Wherein, 1 testing stand；2 fixing end supports；3 fixed links；4 fastening nuts one；5 supporing shells；6 felt pads；7 bolts；
8 first pressure sensors；9 reinforcing bolts；Crimp head on 10；11 clamper tubes；12 lower crimp heads；13 droppers；14 load bars；15U
Type bolt；16 positioning bolts；17 force compensating bars；18 force compensating supports；19 second pressure sensors；20 spring washers one；21 power
Counterbalance spring；22 spring washers two；23 fastening nuts two；24 erecting beds.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of high-speed railway touching net droppers to be bent fretting fatigue testing device, on solving
Problem of the existing technology is stated, the experimental rig is simple to operation, it can be achieved that the bending of various working, plurality of specifications dropper is micro-
Dynamic fatigue test, measurement and control precision are high, and data are more reliable.
Based on this, high-speed railway touching net dropper provided by the invention is bent fretting fatigue testing device, including is fixed on
Fixing end support, force compensating end, load bar and control system on testing stand table top；Supporting shell is provided on fixing end support
One end of dropper is tentatively connected and is fixed by bolt by the fixed link of body, supporing shell side, and fixing end support includes
There are upper crimp head and lower crimp head, is carried out across upper crimp head and lower crimp head at the clamper tube of the dropper after tentatively fixing
It compresses；The other end of dropper is adjustable end, and the adjustable end is connected with force compensating end, and a U-bolt is arranged on force compensating end, is led to
The connecting pin of the other end and U-bolt that change dropper is crossed to realize the adjustable of dropper；It is hung for adjusting to be applied at force compensating end
Power on string；The upper end of load bar is connected with fatigue test machine grip holder, and lower end is fixed by bolt and dropper and tries fatigue
The signals such as test force and the test frequency of machine are tested to be transmitted on dropper；Fixing end support, force compensating end and load bar with control
System electrically connects.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Referring to FIG. 1, wherein, Fig. 1 is the overall structure diagram that the dropper is bent fretting fatigue testing device.
As shown in Figure 1, the present invention provides a kind of high-speed railway touching net dropper bending fretting fatigue testing device, fixing end
Support 2 is fixed on the table top of testing stand 1, is bolted on together with supporing shell 5, and fixed link 3 is utilized by bolt 7
One end of dropper 13 is tentatively connected and is fixed by fastening nut 1, at the clamper tube 11 of dropper 13, passes through upper crimp head 10
It is fixed on fixing end support 2 with lower crimp head 12.Reinforcing bolt 9 applies in test restraining force, passes through first pressure
Sensor 8 transfers force at the clamper tube 11 of test dropper 13, provides normal load.Felt pad 6 is cased in fixed link 3,
It is convenient to play insulating effect in current-carrying test.The other end of dropper 13 is adjustable end, is connected with force compensating end, utilizes U-shaped spiral shell
Adjustable function may be implemented in bolt 15.
The concrete composition at force compensating end is: the adjustable end of dropper 13 is connected by positioning bolt 16 with force compensating bar 17, power
Compensation bar 17 can horizontally slip on the force compensating end support 18 being fixed on erecting bed 24, and 17 one end of force compensating bar passes through fastening
Nut 2 23 is fixed, under the action of force compensating spring 21, provides 13 initial pretightening force of dropper and plays the role of force compensating, the
Two pressure sensors 19 are used to the pretightning force size of real-time monitoring test dropper 13, and force compensating spring 21 passes through spring washer 1
It is positioned and is protected with spring washer 2 22.
14 upper end of load bar is connected with fatigue test machine grip holder, and lower end is fixed by bolt and dropper 13, during test,
The signals such as test force and test frequency are transmitted in dropper pilot system by load bar 14 by fatigue tester, thus into
Row test.
First pressure sensor 8 and second pressure sensor 19 are electrically connected with data acquisition and control system, can be carried out
Real-time monitoring.
The power that reinforcing bolt 9 is applied to crimp head 10 in the present embodiment passes through first pressure sensor 8, and data are real-time
Feed back to acquisition system；The pretightning force that force compensating spring 21 is applied to dropper 13 can will be counted by second pressure sensor 19
Acquisition system is fed back to when factually.It can be by the data of two force snesors of display real-time monitoring, to improve in test
Test efficiency.
The operating process of dropper bending fretting fatigue testing device is:
13 one end of dropper tested will be needed to be installed on fixing end support 2 by reinforcing bolt 9, the other end is installed to power
Compensate support 18 on, by force compensating spring 21 to dropper 13 apply pretightning force, 13 middle section of dropper by load bar 14 with
Fatigue tester is connected.During entire test, the pressure of fixing end and the pretightning force of dropper 13 are set, passes through control fatigue
Testing machine is tested to carry out the dropper of variable element, multi-state.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507801.1A CN109357958A (en) | 2018-12-11 | 2018-12-11 | A kind of high-speed railway touching net dropper bending fretting fatigue testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507801.1A CN109357958A (en) | 2018-12-11 | 2018-12-11 | A kind of high-speed railway touching net dropper bending fretting fatigue testing device |
Publications (1)
| Publication Number | Publication Date |
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| CN109357958A true CN109357958A (en) | 2019-02-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811507801.1A Pending CN109357958A (en) | 2018-12-11 | 2018-12-11 | A kind of high-speed railway touching net dropper bending fretting fatigue testing device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118695A (en) * | 2019-05-23 | 2019-08-13 | 南京工程学院 | A kind of constant stress load hydrogen permeability experimental facility and test method |
| CN110346227A (en) * | 2019-08-07 | 2019-10-18 | 中法高速铁路技术(西安)有限公司 | A kind of experimental rig of electric railway dropper fatigue strength |
| CN111678818A (en) * | 2020-05-22 | 2020-09-18 | 京东方科技集团股份有限公司 | A flexible screen module bending fixture |
| CN113049422A (en) * | 2021-02-10 | 2021-06-29 | 新沂市宏祥电子有限公司 | Wire bending device for data line bending performance test |
| CN113970431A (en) * | 2021-10-22 | 2022-01-25 | 中国铁道科学研究院集团有限公司标准计量研究所 | Multichannel contact net spare part fatigue test device |
| CN114002080A (en) * | 2021-11-16 | 2022-02-01 | 西南交通大学 | Elastic sling fatigue test device and method |
| CN116773153A (en) * | 2022-05-14 | 2023-09-19 | 王宣 | High-speed railway contact net dropper fatigue testing machine under extreme weather condition |
| CN116879077A (en) * | 2023-09-04 | 2023-10-13 | 中国铁建电气化局集团有限公司 | Integrated detection device for fatigue strength of electrified railway hanger |
| CN117906935A (en) * | 2024-03-18 | 2024-04-19 | 中铁电气化局集团有限公司 | Contact net hanger detection device and detection method |
| CN119064120A (en) * | 2024-08-30 | 2024-12-03 | 中交第二航务工程局有限公司 | Self-balancing device and test method suitable for main cable strand extrusion deformation test |
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|---|---|---|---|---|
| CN110118695B (en) * | 2019-05-23 | 2021-11-30 | 南京工程学院 | Constant stress loading hydrogen permeation experimental device and method |
| CN110118695A (en) * | 2019-05-23 | 2019-08-13 | 南京工程学院 | A kind of constant stress load hydrogen permeability experimental facility and test method |
| CN110346227B (en) * | 2019-08-07 | 2024-05-31 | 中法高速铁路技术(西安)有限公司 | Test device for fatigue strength of electrified railway hanger |
| CN110346227A (en) * | 2019-08-07 | 2019-10-18 | 中法高速铁路技术(西安)有限公司 | A kind of experimental rig of electric railway dropper fatigue strength |
| CN111678818A (en) * | 2020-05-22 | 2020-09-18 | 京东方科技集团股份有限公司 | A flexible screen module bending fixture |
| CN113049422A (en) * | 2021-02-10 | 2021-06-29 | 新沂市宏祥电子有限公司 | Wire bending device for data line bending performance test |
| CN113970431A (en) * | 2021-10-22 | 2022-01-25 | 中国铁道科学研究院集团有限公司标准计量研究所 | Multichannel contact net spare part fatigue test device |
| CN113970431B (en) * | 2021-10-22 | 2023-02-17 | 中国铁道科学研究院集团有限公司标准计量研究所 | Multichannel contact net spare part fatigue test device |
| CN114002080A (en) * | 2021-11-16 | 2022-02-01 | 西南交通大学 | Elastic sling fatigue test device and method |
| CN116773153A (en) * | 2022-05-14 | 2023-09-19 | 王宣 | High-speed railway contact net dropper fatigue testing machine under extreme weather condition |
| CN116879077A (en) * | 2023-09-04 | 2023-10-13 | 中国铁建电气化局集团有限公司 | Integrated detection device for fatigue strength of electrified railway hanger |
| CN116879077B (en) * | 2023-09-04 | 2023-12-19 | 中国铁建电气化局集团有限公司 | Integrated detection device for fatigue strength of electrified railway hanger |
| CN117906935A (en) * | 2024-03-18 | 2024-04-19 | 中铁电气化局集团有限公司 | Contact net hanger detection device and detection method |
| CN117906935B (en) * | 2024-03-18 | 2024-05-10 | 中铁电气化局集团有限公司 | Contact net hanger detection device and detection method |
| CN119064120A (en) * | 2024-08-30 | 2024-12-03 | 中交第二航务工程局有限公司 | Self-balancing device and test method suitable for main cable strand extrusion deformation test |
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Application publication date: 20190219 |